一种新的互耦补偿方法及其在DOA估计中的应用

A new mutual coupling compensation method and its application to DOA estimation

提出了一种新的互耦补偿方法并应用到偶极子天线阵,该方法采用特征基函数作为各阵元在阵列环境中的电流分布,应用感应电动势法计算互阻抗矩阵;与已有的方法比较,它具有显式的计算公式,不仅计算量小,而且有效考虑了传统开路模型中开路阵元的散射作用;通过在空间谱估计中的应用,证明了该方法具有明显高于传统方法的补偿精度。

A new mutual coupling compensation method, which based on a new mutual impedance matrix, is proposed for the application to dipole arrays. The mutual impedance matrix is deduced by EMF method based on the current distribution obtained by the characteristic basis function method. It appears in a concise and explicit formulation that facilitates the numerical calculation. The compensation per- formance is demonstrated and evaluated through its application to DOA estimation. The numerical results show that the proposed new method exhibits excellent compensation performance compared with conventional mutual impedance matrix approach.